d3.geoDistance(a, b) Returns the great-arc distance in

circle.precision([angle]) If precision is specified, sets the circle precision to the specified angle in degrees

identity.reflectX([reflect]) If reflect is specified, sets whether or not the x-dimension is reflected

graticule.outline() Returns a GeoJSON Polygon geometry object representing the outline of this graticule, i.e. along the meridians

path.bounds(object) Returns the projected planar bounding box (typically in pixels) for the specified GeoJSON object

stream.polygonEnd() Indicates the end of a polygon.

d3.geoInterpolate(a, b) Returns an interpolator function given two points a and b. Each point must

d3.geoTransform(methods) Defines an arbitrary transform using the methods defined on the specified methods object.

path.pointRadius([radius]) If radius is specified, sets the radius used to display Point and MultiPoint features

projection.scale([scale]) If scale is specified, sets the projection’s scale factor to the specified value